How to attachment with email; able to send mails but how to attach a file

Hi all,
      this is my mail sender clas file
public class MailSender
{
    

    public static bool SendEmail(
        string pGmailEmail,
        string pGmailPassword,
        string pTo,
        string pSubject,
        string pBody,
        System.Web.Mail.MailFormat pFormat,
        string pAttachmentPath)
    {
        try
        {
            System.Web.Mail.MailMessage myMail = new System.Web.Mail.MailMessage();
      &n ...